For the following exercises, prove the identity. cos(3x) cos 3 x = cos x sin 2 x sin x sin(2x)

Chapter 7, Review Exercises #16

For the following exercises, prove the identity.

cos(3x) − cosx = − cos x sin2 x − sin x sin(2x)

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Related Book For answer-question

Precalculus

1st Edition

Authors: Jay Abramson

ISBN: 9781938168345